A temperature of 3 to 4°C on average is preferred, with upper and lower limits of 0 to 7°C. At 7°C food will deteriorate more quickly. 

Whirlpool (whirlpool owns maytag, amana, kitchen aid, roper, and some kenmore's are built by whirlpool.) Frigidaire (frigidaire owns, or rather is owned by electrolux, and builds some kenmore's.) Bosch (best known for their dishwashers, but has moved into refrigerators and stoves.

French door has become the most popular style in refrigeration. A French door by definition is a side by side top with a bottom freezer. This style is better than a side by side for the refrigerator, because you will be eye level with most of the foods, shelves, and crisper drawers.

Generally, a top-mounted freezer model is the least expensive, costing between $350 and $600. Bottom-mounted freezer refrigerators may cost about $800 to $1,200. Increasingly, homeowners are choosing side-by-side models because of their larger capacity and the ease of accessing both the fridge and freezer.